Elegant Custom-Built Home in Prestigious Incorporated Village of Old Westbury. Nestled in the heart of Old Westbury, known for its rich history and luxurious estates, this custom-built architectural masterpiece sits on 1.21 private acres at the end of a quiet dead-end street. This 4,126 sq. ft. home boasts 4 spacious bedrooms, a versatile bonus room, and 4.5 baths. The formal living room features a stunning European marble wood-burning fireplace, while floor-to-ceiling windows in both the living and dining rooms fill the space with natural light. The formal dining room has been freshly painted, complementing the hardwood floors throughout. The newly renovated kitchen featuring stainless steel appliances, a double wall oven, an island counter, and a large casual dining area with skylights and floor-to-ceiling windows, offering panoramic views of the resort-style backyard. The first-floor primary suite is a private retreat with an oversized walk-in closet and a spa-like ensuite bath, complete with double vanity sinks, a soaking tub, a separate shower, and marble counters. Adjacent to the suite, a private office with French doors leads to a serene deck. A bright and airy game room/sunroom/entertainment space with skylights, floor-to-ceiling windows, and sliding doors opens directly to the backyard. A main bath with outdoor access is conveniently located for pool side convenience. Upstairs, a second primary ensuite boasts a walk-in closet with built-ins, a full bath, and cathedral ceilings. Two additional bedrooms one with cathedral ceilings and the other with custom built-in desk and shelving a well-appointed full bath. The fully finished basement offers a gym, bonus room, full bath, laundry room, and ample storage. Walk out ramp from basement convenient for storing items in the basement storage area leads to 2 car garage. The meticulously landscaped backyard is an entertainer's dream, featuring a gunite in-ground pool with a diving board, a brick patio, a Trex deck, and lush rhododendron gardens. Experience luxury, privacy, and timeless elegance in one of Long Island's most prestigious communities.